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Finding the Fourth Proportional to 91,393.49, 125,842.64 and 79,999.22

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Solution

The fourth proportional to 91,393.49, 125,842.64 and 79,999.22 is: 110,153.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,393.49 : 125,842.64 = 79,999.22 : x
  2. Step 2: Convert to fraction form
    91,393.49/125,842.64 = 79,999.22/x
  3. Step 3: Cross multiply
    91,393.49x = 125,842.64 × 79,999.22
  4. Step 4: Simplify right side
    91,393.49x = 10,067,312,957.35
  5. Step 5: Solve for x
    x = 10,067,312,957.35/91,393.49
  6. Step 6: Final answer
    x = 110,153.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.